Click to go to back to www.131mirafiori.com Welcome, Guest. Please login or register.
May 07, 2024, 09:57:25 PM
Home Help Login Register

+  131mirafiori forum
|-+  131mirafiori home
| |-+  The Garage (Moderator: Admin)
| | |-+  Measuring for shim calculations Hot or Cold.		 « previous next »
Pages: [1] Go Down Print
Author Topic: Measuring for shim calculations Hot or Cold.  (Read 4632 times)
parrish
Hero Member
****
Offline Offline

Posts: 831
« on: June 07, 2011, 05:23:43 PM »
When measuring the gap between the cam and 'Cam follower' should the engine be hot or cold?
What is the exact procedure and calculation?
Steve
Logged
Steve Parrish owner of:  1977 131 4 door.
Henk
Hero Member
****
Offline Offline

Posts: 225
« Reply #1 on: June 07, 2011, 05:54:38 PM »
depends on the manufactures mantainance specs
but in general cold engine what I remember..
we would let them stay overnight and measure clearance in the morning
Logged
Henk
Fiat Mirafiori 1.6 A1.00
MB W114 280 C
Honda CB750 1972
BMW E30 318 Touring
mirafioriman
Hero Member
****
Offline Offline

Posts: 3,133


My next project......


WWW
« Reply #2 on: June 07, 2011, 05:56:08 PM »
Far easier on a cold engine, you don't burn your fingers Wink
Logged
My name is David Hobbs and I currently own: Fiat 130 berlina, Fiat 131 Supermirafiori, Fiat 131 Panorama, Fiat 132 2000, Fiat Argenta, Mercedes 300SEL 6.3, 450 SEL 6.9 a 420 SEL, Citroen Xantia
Henk
Hero Member
****
Offline Offline

Posts: 225
« Reply #3 on: June 07, 2011, 06:17:42 PM »
yep,  I 've had my share (blister wise)
Logged
Henk
Fiat Mirafiori 1.6 A1.00
MB W114 280 C
Honda CB750 1972
BMW E30 318 Touring
Tas131
Hero Member
****
Offline Offline

Posts: 761
« Reply #4 on: June 07, 2011, 10:34:27 PM »
Cold, the gap will close a bit when hot!
Logged
Mick.
Tasmania. Australia.
Red/grey series 2 (Daily driver)
Dark blue series 1 (Dismantled)
Light blue series 2 (Crashed then dismantled)
Metallic blue series 2 (Dismantled)
Henk
Hero Member
****
Offline Offline

Posts: 225
« Reply #5 on: June 08, 2011, 06:24:17 PM »
yes that is right it gets smaller when temp. is rising
the whole idea is to still have a small gap when the engine is hot (to make sure the valves are 100% closed when not engaged by the cam)
some manufatures give clearance specs for both cold and hot engine but if you only know the cold setting, it will be difficult to calculate the exact hot setting (you need to know material, diameter / mass of camshaft, percentage of volume increase related to temp etc.
I believe there is some generic cold to hot conversion rule, but I forgot what it is.....
Logged
Henk
Fiat Mirafiori 1.6 A1.00
MB W114 280 C
Honda CB750 1972
BMW E30 318 Touring
Pages: [1] Go Up Print 
« previous next »
Jump to:  


Disclaimer: This forum is available free and is part of a non-profit website run by volunteers for the benefit of owners and enthusiasts of the various models of the Fiat 131 and derivatives. Information is provided in good faith and no liability can be accepted by any individual for any situation arising from the use of this information.

Opinions expressed in this forum are those of the contributors and not of the website's owners, administrators or moderators who cannot accept any responsibility for the results of following any advice given by contributors.

The administrators and moderators of this forum reserve the right to edit or delete anything they consider to be of a defamatory, discriminatory, derogatory, abusive or otherwise unacceptable nature.


Powered by SMF 1.1.21 | SMF © 2015, Simple Machines

Click to visit www.thotos.com